import Vue from 'vue'
import VueRouter from 'vue-router'
import Login from '../components/Login.vue'
import Home from '../components/Home.vue'

Vue.use(VueRouter)

const routes = [
  {path: '/', redirect: '/login'},
  {path: '/login', component: Login},
  {path: '/home', component: Home},
]
//接收router
const router = new VueRouter({
  routes
})

//挂载路由导航守卫
router.beforeEach((to,from,next)=>{
  //to将要访问的路径
  //from 代表是从哪个路径跳转而来
  //next 是一个函数，表示放行
  //next（）放行 next('/login') 强制跳转
  if (to.path == '/login') return next()
  //获取token
  const tokenStr = window.sessionStorage.getItem('token')
  // 没有token, 强制跳转到登录页
  if(!tokenStr) return next('/login')
  next()
})

//暴露出去
export default router
